Amsterdam’s Van Gogh Museum on Monday unveiled a newly discovered landscape painting from the height of the Dutch master’s career, abandoned for years as a forgery in a Norwegian attic. “Sunset at Montmajour,” a large oil...

THE HAGUE — Art researchers at Amsterdam’s Van Gogh Museum said Tuesday they have “discovered” a work by Dutch painter Vincent van Gogh — long thought to have been a self-portrait — was in fact a picture of his...